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Composite Fermions in Periodic and Random Anti-Dot Lattices

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Smet, J. ; Weiss, Dieter ; Klitzing, K. ; Coleridge, P. ; Wasilewski, Z. ; Bergmann, R. ; Schweizer, H. ; Scherer, A.
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Date of publication of this fulltext: 05 Aug 2009 13:57


The longitudinal and Hall magnetoresistance of random and periodic arrays of artificial scatterers, imposed on a high-mobility two- dimensional electron gas, were investigated in the vicinity of Landau level filling factor í=1/2. In periodic arrays, commensurability effects between the period of the antidot array and the cyclotron radius of composite fermions are observed. In addition, ...


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